/* canvas — 暖色纸面白板 */

:root {
  --paper: #f2ede1;
  --paper-soft: #f7f2e7;
  --paper-deep: #e8e1d2;
  --rail: #e9e2d3;
  --rail-active: #f8f3e7;
  --ink: #332e27;
  --ink-soft: #575044;
  --muted: #8a8171;
  --faint: #aaa08e;
  --line: rgba(82, 71, 54, 0.13);
  --line-strong: rgba(82, 71, 54, 0.24);
  --accent: #b45f3f;
  --accent-deep: #8f452c;
  --accent-soft: #f0d9cb;
  --green: #4c6b5a;
  --danger: #a94535;
  --white: #fffdf7;
  --shadow-card: 0 2px 3px rgba(73, 61, 43, 0.06), 0 10px 22px rgba(73, 61, 43, 0.07);
  --shadow-float: 0 18px 46px rgba(63, 51, 33, 0.15), 0 3px 10px rgba(63, 51, 33, 0.08);
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-note: "Iowan Old Style", "Palatino Linotype", Palatino, "Songti SC",
    "Noto Serif CJK SC", "Source Han Serif SC", "STSong", serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo,
    "Noto Sans Mono CJK SC", monospace;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-ui);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
button, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: var(--accent-deep); }
::selection { background: rgba(180, 95, 63, 0.22); }

.hidden { display: none !important; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.muted { color: var(--muted); }

kbd {
  display: inline-block;
  min-width: 18px;
  padding: 1px 5px;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: rgba(255, 253, 247, 0.6);
  color: var(--ink-soft);
  font-family: var(--font-ui);
  font-size: 10px;
  line-height: 1.45;
  text-align: center;
  white-space: nowrap;
}

/* ---------------- 整体布局 ---------------- */

.app-body {
  overflow: hidden;
  background: var(--paper);
  overscroll-behavior: none;
}
.app {
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr);
  height: 100vh;
  height: 100dvh;
}
.app.loading { opacity: 0.7; }

/* ---------------- 左侧白板列表 ---------------- */

.rail {
  position: relative;
  z-index: 20;
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100%;
  padding: 16px 12px 12px;
  background:
    radial-gradient(ellipse at 15% 0%, rgba(255, 255, 255, 0.32), transparent 55%),
    var(--rail);
  border-right: 1px solid var(--line);
}
.rail-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2px 6px 16px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  text-decoration: none;
  font-size: 18px;
  font-weight: 650;
  letter-spacing: 0.01em;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  color: var(--accent);
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: rgba(255, 253, 247, 0.55);
}
.rail-caption {
  padding: 0 9px 8px;
  color: var(--faint);
  font-size: 10.5px;
  letter-spacing: 0.14em;
}
.board-list {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-height: 60px;
  overflow-y: auto;
  padding: 0 2px 8px;
  scrollbar-width: thin;
}
.board-item {
  position: relative;
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr) 20px;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 9px 8px 9px 9px;
  border: 1px solid transparent;
  border-radius: 7px;
  background: transparent;
  color: var(--ink-soft);
  text-align: left;
}
.board-item:hover { background: rgba(255, 253, 247, 0.42); }
.board-item.active {
  background: var(--rail-active);
  border-color: var(--line);
  color: var(--ink);
  box-shadow: 0 2px 8px rgba(73, 61, 43, 0.05);
}
.board-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  flex: 0 0 auto;
  box-shadow: inset 0 0 0 1px rgba(50, 40, 25, 0.08);
}
.board-dot.color-amber { background: #d9a441; }
.board-dot.color-peach { background: #d98d6b; }
.board-dot.color-sage { background: #7b9a7d; }
.board-dot.color-sky { background: #7f9eae; }
.board-dot.color-lilac { background: #9b86ad; }
.board-dot.color-rose { background: #c7858c; }
.board-dot.color-plain { background: #c4baa6; }
.board-item-text { min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.board-item-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
  font-weight: 550;
  line-height: 1.35;
}
.board-item-meta {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--faint);
  font-size: 10.5px;
}
.board-more {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 22px;
  border-radius: 4px;
  color: var(--faint);
  opacity: 0;
  font-size: 16px;
  line-height: 1;
}
.board-item:hover .board-more,
.board-item.active .board-more { opacity: 1; }
.board-more:hover { background: rgba(80, 65, 45, 0.09); color: var(--ink); }

.rail-new {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin: 8px 2px;
  padding: 9px 10px;
  border: 1px dashed var(--line-strong);
  border-radius: 7px;
  background: transparent;
  color: var(--ink-soft);
  font-size: 12.5px;
}
.rail-new:hover { border-color: var(--accent); color: var(--accent-deep); background: rgba(255, 253, 247, 0.4); }
.rail-new .plus { font-size: 15px; line-height: 1; }
.rail-foot {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}
.rail-action {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 9px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--ink-soft);
  font-size: 12px;
  text-align: left;
  text-decoration: none;
}
.rail-action:hover { background: rgba(255, 253, 247, 0.45); color: var(--ink); }
.rail-action kbd { margin-left: auto; }
.rail-note { padding: 4px 9px; color: var(--faint); font-size: 10.5px; }
.rail-close, .rail-open { display: none; }
.rail-close.icon-btn, .rail-open.icon-btn { display: none; }
.rail-scrim { display: none; }

/* ---------------- 主区域 / 顶栏 ---------------- */

.stage {
  position: relative;
  display: grid;
  grid-template-rows: 58px minmax(0, 1fr);
  min-width: 0;
  height: 100%;
  overflow: hidden;
}
.topbar {
  position: relative;
  z-index: 25;
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  padding: 0 18px;
  background: rgba(245, 240, 230, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.rail-open { flex: 0 0 auto; }
.title-wrap {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
  flex: 1;
}
.board-title {
  max-width: min(48vw, 560px);
  margin: 0;
  padding: 4px 7px;
  border: 1px solid transparent;
  border-radius: 5px;
  outline: none;
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 620;
  line-height: 1.35;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.board-title:hover { background: rgba(255, 253, 247, 0.42); }
.board-title:focus {
  background: var(--white);
  border-color: var(--line-strong);
  text-overflow: clip;
}
.top-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 0 0 auto;
}
.save-status {
  margin-right: 7px;
  color: var(--faint);
  font-size: 11.5px;
  white-space: nowrap;
  user-select: none;
}
.save-status.dirty { color: #9a6a2f; }
.save-status.saving { color: var(--muted); }
.save-status.error { color: var(--danger); cursor: pointer; }
.save-status.conflict { color: var(--danger); cursor: pointer; text-decoration: underline dotted; }
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 7px;
  background: transparent;
  color: var(--ink-soft);
  font-size: 20px;
  line-height: 1;
}
.icon-btn:hover { background: rgba(255, 253, 247, 0.65); border-color: var(--line); color: var(--ink); }
.top-btn { color: var(--muted); }
.top-btn:hover { color: var(--ink); }

/* ---------------- 画布 ---------------- */

.viewport {
  position: relative;
  overflow: hidden;
  outline: none;
  background-color: var(--paper);
  background-image: radial-gradient(circle at 1px 1px, rgba(97, 83, 62, 0.19) 1px, transparent 1.2px);
  background-size: 26px 26px;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  overscroll-behavior: none;
  cursor: default;
}
.viewport[data-bg="plain"] { background-image: none; }
.viewport[data-bg="lines"] {
  background-image:
    linear-gradient(rgba(97, 83, 62, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(97, 83, 62, 0.12) 1px, transparent 1px);
}
.viewport::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 22% 8%, rgba(255, 255, 255, 0.42), transparent 48%),
    radial-gradient(ellipse at 88% 96%, rgba(156, 128, 83, 0.08), transparent 55%);
}
.viewport.drag-over::after {
  content: "松手放入图片";
  position: absolute;
  inset: 14px;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--accent);
  border-radius: 12px;
  background: rgba(245, 239, 226, 0.64);
  color: var(--accent-deep);
  font-size: 15px;
  letter-spacing: 0.06em;
  pointer-events: none;
}
.world {
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 0;
  z-index: 2;
  transform-origin: 0 0;
  will-change: transform;
  --inv: 1;
}
.cards-layer { position: absolute; left: 0; top: 0; width: 0; height: 0; }
.wire-layer, .ink-layer {
  position: absolute;
  left: 0;
  top: 0;
  width: 1px;
  height: 1px;
  overflow: visible;
  pointer-events: none;
}
.wire-layer { z-index: 1; }
.cards-layer { z-index: 2; }
.ink-layer { z-index: 3; }

.marquee {
  position: absolute;
  z-index: 20;
  border: 1px dashed var(--accent);
  background: rgba(180, 95, 63, 0.07);
  pointer-events: none;
}
.selection {
  position: absolute;
  z-index: 30;
  border: 1.5px solid var(--accent);
  border-radius: 4px;
  pointer-events: none;
  box-shadow: 0 0 0 1px rgba(180, 95, 63, 0.10);
}
.handle {
  position: absolute;
  width: calc(10px * var(--inv));
  height: calc(10px * var(--inv));
  border: 1.5px solid var(--accent);
  border-radius: 999px;
  background: var(--white);
  box-shadow: 0 1px 3px rgba(70, 50, 30, 0.2);
  pointer-events: auto;
}
.handle-w { left: 0; top: 50%; transform: translate(-50%, -50%); cursor: ew-resize; }
.handle-e { left: 100%; top: 50%; transform: translate(-50%, -50%); cursor: ew-resize; }
.handle-nw { left: 0; top: 0; transform: translate(-50%, -50%); cursor: nwse-resize; }
.handle-ne { left: 100%; top: 0; transform: translate(-50%, -50%); cursor: nesw-resize; }
.handle-sw { left: 0; top: 100%; transform: translate(-50%, -50%); cursor: nesw-resize; }
.handle-se { left: 100%; top: 100%; transform: translate(-50%, -50%); cursor: nwse-resize; }

/* ---------------- 卡片 ---------------- */

.card {
  position: absolute;
  box-sizing: border-box;
  border: 1px solid rgba(74, 60, 40, 0.13);
  background: var(--card-bg, #f7e7b8);
  border-radius: 7px;
  box-shadow: var(--shadow-card);
  color: #3a342b;
  font-family: var(--font-note);
  font-size: var(--fs, 15px);
  line-height: 1.55;
  overflow-wrap: anywhere;
  user-select: none;
  -webkit-user-select: none;
  cursor: grab;
  touch-action: none;
}
.card:hover { box-shadow: 0 3px 5px rgba(73, 61, 43, 0.07), 0 14px 28px rgba(73, 61, 43, 0.10); }
.viewport.dragging .card { cursor: grabbing; }
.card.locked { cursor: default; }
.card.editing { cursor: text; }
.card.selected { box-shadow: 0 3px 5px rgba(73, 61, 43, 0.07), 0 14px 28px rgba(73, 61, 43, 0.11); }
.card.flash { animation: card-flash 1.25s ease-out; }
@keyframes card-flash {
  0% { box-shadow: 0 0 0 0 rgba(180, 95, 63, 0.55), var(--shadow-card); }
  45% { box-shadow: 0 0 0 9px rgba(180, 95, 63, 0.14), var(--shadow-card); }
  100% { box-shadow: 0 0 0 0 rgba(180, 95, 63, 0), var(--shadow-card); }
}

.card.color-amber { --card-bg: #f7e7b8; }
.card.color-peach { --card-bg: #f3d7c3; }
.card.color-sage { --card-bg: #dce7d1; }
.card.color-sky { --card-bg: #d7e4ea; }
.card.color-lilac { --card-bg: #e7deee; }
.card.color-rose { --card-bg: #f0d8d9; }
.card.color-plain { --card-bg: #fffdf8; }

.card.card-note {
  padding: 15px 17px 16px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.32), rgba(255, 255, 255, 0) 34%),
    var(--card-bg);
}
.card.card-note.is-bold { font-weight: 700; }

.card.card-text {
  padding: 6px 7px;
  border-color: transparent;
  background: transparent;
  box-shadow: none;
  color: var(--ink);
}
.card.card-text:hover,
.card.card-text.selected { box-shadow: none; }
.card.card-text.is-bold { font-weight: 700; }
.card.card-text .card-content h3,
.card.card-text .card-content h4,
.card.card-text .card-content h5 { margin-top: 0; }
.card.card-text.color-amber .card-content { color: #7b5a23; }
.card.card-text.color-peach .card-content { color: #884d39; }
.card.card-text.color-sage .card-content { color: #3f5b44; }
.card.card-text.color-sky .card-content { color: #335c6d; }
.card.card-text.color-lilac .card-content { color: #5f4b72; }
.card.card-text.color-rose .card-content { color: #7c454c; }

.card.card-image {
  padding: 0;
  border-radius: 4px;
  border-color: rgba(74, 60, 40, 0.16);
  background: #fff;
  overflow: hidden;
}
.card.card-image img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #f1ece2;
  pointer-events: none;
}
.image-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 22px 10px 8px;
  background: linear-gradient(transparent, rgba(35, 28, 19, 0.56));
  color: #fff;
  font-family: var(--font-ui);
  font-size: 11.5px;
  line-height: 1.35;
  pointer-events: none;
}
.image-error {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f2ede3;
  color: var(--muted);
  font-family: var(--font-ui);
  font-size: 12px;
}

.card-content { min-height: 18px; }
.card-content > :first-child { margin-top: 0; }
.card-content > :last-child { margin-bottom: 0; }
.card-content p { margin: 0 0 0.55em; }
.card-content h3 { font-size: 1.3em; line-height: 1.3; margin: 0.2em 0 0.4em; font-weight: 650; }
.card-content h4 { font-size: 1.14em; line-height: 1.35; margin: 0.2em 0 0.4em; font-weight: 650; }
.card-content h5 { font-size: 1.02em; line-height: 1.4; margin: 0.2em 0 0.35em; font-weight: 650; }
.card-content ul, .card-content ol { margin: 0.2em 0 0.6em; padding-left: 1.35em; }
.card-content li { margin: 0.12em 0; }
.card-content blockquote {
  margin: 0.3em 0 0.6em;
  padding: 0.1em 0 0.1em 0.8em;
  border-left: 2.5px solid rgba(76, 107, 90, 0.55);
  color: var(--ink-soft);
}
.card-content code {
  padding: 0.08em 0.3em;
  border-radius: 3px;
  background: rgba(78, 65, 45, 0.09);
  font-family: var(--font-mono);
  font-size: 0.88em;
}
.card-content a { color: var(--accent-deep); text-decoration-thickness: 1px; text-underline-offset: 2px; }
.card-content strong { font-weight: 700; }
.card-content em { font-style: italic; }
.task-list { list-style: none; padding-left: 0 !important; }
.task { display: flex; align-items: flex-start; gap: 6px; }
.task-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 0.22em;
  border: 1.3px solid rgba(74, 60, 40, 0.4);
  border-radius: 3px;
  color: #fff;
  font-family: var(--font-ui);
  font-size: 10px;
  line-height: 1;
}
.task.done .task-box { background: var(--green); border-color: var(--green); }
.task.done > span:last-child { color: var(--muted); text-decoration: line-through; }
.card-placeholder { color: rgba(80, 68, 50, 0.42); font-style: italic; }

.card-input {
  display: block;
  width: 100%;
  min-height: 1.5em;
  padding: 0;
  margin: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: inherit;
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  font-weight: inherit;
  text-align: inherit;
  resize: none;
  overflow: hidden;
  user-select: text;
  -webkit-user-select: text;
  cursor: text;
}

/* ---------------- 工具栏 ---------------- */

.toolbar {
  position: absolute;
  left: 50%;
  bottom: 22px;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 2px;
  max-width: calc(100vw - 40px);
  padding: 6px;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background: rgba(251, 247, 238, 0.92);
  box-shadow: var(--shadow-float);
  transform: translateX(-50%);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.tool-btn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  width: 42px;
  height: 40px;
  padding: 0;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--ink-soft);
}
.tool-btn:hover { background: rgba(80, 65, 45, 0.08); color: var(--ink); }
.tool-btn.active { background: var(--ink); color: #f8f2e6; }
.tool-label { display: none; }
.tool-sep {
  width: 1px;
  height: 24px;
  margin: 0 5px;
  background: var(--line-strong);
}
.pen-opts {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 0 5px 0 1px;
}
.pen-color {
  width: 18px;
  height: 18px;
  padding: 0;
  border: 2px solid rgba(255, 253, 247, 0.9);
  border-radius: 999px;
  box-shadow: 0 0 0 1px var(--line-strong);
}
.pen-color.active { box-shadow: 0 0 0 2px var(--ink); }
.pen-width {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 21px;
  height: 24px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 5px;
  background: transparent;
}
.pen-width span { display: block; width: 15px; background: var(--ink); border-radius: 999px; }
.pen-width:hover { background: rgba(80, 65, 45, 0.08); }
.pen-width.active { border-color: var(--line-strong); background: rgba(80, 65, 45, 0.07); }

/* ---------------- 空状态 / 提示 ---------------- */

.empty-hint {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  pointer-events: none;
}
.empty-card {
  max-width: 360px;
  padding: 28px 32px;
  border: 1px dashed var(--line-strong);
  border-radius: 10px;
  background: rgba(255, 252, 244, 0.58);
  box-shadow: 0 8px 24px rgba(73, 61, 43, 0.05);
  text-align: center;
  backdrop-filter: blur(2px);
}
.empty-kicker {
  margin-bottom: 9px;
  color: var(--accent-deep);
  font-family: var(--font-note);
  font-size: 20px;
  font-weight: 600;
}
.empty-card p { margin: 6px 0; color: var(--ink-soft); font-size: 13px; }
.empty-card p.muted { color: var(--muted); font-size: 11.5px; }
.empty-card kbd { margin: 0 1px; }
.hint-touch { display: none; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 88px;
  z-index: 160;
  max-width: min(84vw, 440px);
  padding: 9px 14px;
  border-radius: 8px;
  background: rgba(48, 41, 31, 0.94);
  color: #f8f2e6;
  font-size: 12.5px;
  line-height: 1.45;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 8px);
  transition: opacity 0.18s ease, transform 0.18s ease;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------------- 弹窗 ---------------- */

.modal {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 12vh 18px 24px;
  background: rgba(43, 35, 25, 0.28);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}
.modal-card {
  width: 100%;
  max-width: 620px;
  max-height: 72vh;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: var(--white);
  box-shadow: 0 30px 80px rgba(40, 30, 18, 0.25);
  animation: modal-in 0.16s ease-out;
}
@keyframes modal-in {
  from { opacity: 0; transform: translateY(-5px) scale(0.99); }
  to { opacity: 1; transform: none; }
}
.search-card { display: flex; flex-direction: column; }
.search-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}
.search-input {
  flex: 1;
  min-width: 0;
  padding: 2px 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  font-size: 16px;
}
.search-input::placeholder { color: var(--faint); }
.search-results {
  overflow-y: auto;
  padding: 7px;
  min-height: 80px;
}
.search-hint { margin: 12px 10px; color: var(--muted); font-size: 12.5px; }
.search-result {
  display: block;
  width: 100%;
  padding: 11px 12px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  text-align: left;
}
.search-result:hover, .search-result:focus { background: rgba(80, 65, 45, 0.06); outline: none; }
.sr-board {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 11px;
}
.sr-type { margin-left: auto; color: var(--faint); }
.sr-snippet {
  display: block;
  color: var(--ink-soft);
  font-family: var(--font-note);
  font-size: 13.5px;
  line-height: 1.55;
}
.sr-snippet mark { padding: 0 1px; border-radius: 2px; background: #f2d9a7; color: inherit; }

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px 8px;
}
.modal-head h2 { margin: 0; font-size: 18px; font-weight: 650; }
.help-card { max-width: 560px; overflow-y: auto; }
.help-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 9px 18px;
  padding: 12px 22px 18px;
}
.help-grid > div {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--ink-soft);
  font-size: 12.5px;
}
.help-grid kbd { flex: 0 0 auto; }
.help-note {
  margin: 0;
  padding: 14px 22px 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

/* ---------------- 右键菜单 ---------------- */

.context-menu {
  position: fixed;
  z-index: 130;
  min-width: 196px;
  padding: 6px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--white);
  box-shadow: 0 22px 55px rgba(45, 34, 20, 0.2), 0 3px 8px rgba(45, 34, 20, 0.08);
}
.ctx-head {
  padding: 7px 9px 6px;
  overflow: hidden;
  color: var(--muted);
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.ctx-label { padding: 8px 9px 4px; color: var(--faint); font-size: 10.5px; letter-spacing: 0.06em; }
.ctx-colors { display: flex; gap: 7px; padding: 3px 9px 9px; }
.ctx-color {
  width: 19px;
  height: 19px;
  padding: 0;
  border: 1px solid rgba(70, 55, 35, 0.16);
  border-radius: 999px;
}
.ctx-color.color-amber { background: #ecc66a; }
.ctx-color.color-peach { background: #e4a888; }
.ctx-color.color-sage { background: #a9c0a7; }
.ctx-color.color-sky { background: #a5c0cc; }
.ctx-color.color-lilac { background: #c0b0cf; }
.ctx-color.color-rose { background: #ddaab0; }
.ctx-color.color-plain { background: #fffdf8; }
.ctx-color.active { box-shadow: 0 0 0 2px var(--white), 0 0 0 3px var(--accent); }
.ctx-sizes { display: flex; gap: 4px; padding: 2px 9px 8px; }
.ctx-size {
  min-width: 30px;
  height: 25px;
  padding: 0 7px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: transparent;
  color: var(--ink-soft);
  font-size: 11.5px;
}
.ctx-size:hover { background: rgba(80, 65, 45, 0.06); }
.ctx-size.active { border-color: var(--accent); color: var(--accent-deep); background: var(--accent-soft); }
.ctx-item {
  display: block;
  width: 100%;
  padding: 8px 9px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--ink-soft);
  font-size: 12.5px;
  text-align: left;
}
.ctx-item:hover { background: rgba(80, 65, 45, 0.07); color: var(--ink); }
.ctx-item.danger { color: var(--danger); }
.ctx-item.danger:hover { background: rgba(169, 69, 53, 0.08); }

/* ---------------- 光标状态 ---------------- */

.app-body[data-tool="select"] .viewport { cursor: default; }
.app-body[data-tool="hand"] .viewport { cursor: grab; }
.app-body[data-tool="hand"] .viewport.panning { cursor: grabbing; }
.app-body[data-tool="pen"] .viewport { cursor: crosshair; }
.app-body[data-tool="eraser"] .viewport { cursor: cell; }
.app-body[data-tool="note"] .viewport,
.app-body[data-tool="text"] .viewport { cursor: copy; }
.viewport.space-pan { cursor: grab; }
.viewport.panning { cursor: grabbing; }

.app-body[data-tool="hand"] .cards-layer,
.app-body[data-tool="pen"] .cards-layer,
.app-body[data-tool="eraser"] .cards-layer,
.app-body[data-tool="note"] .cards-layer,
.app-body[data-tool="text"] .cards-layer { pointer-events: none; }

/* ---------------- 登录页 ---------------- */

.login-body {
  min-height: 100%;
  background:
    radial-gradient(circle at 1px 1px, rgba(97, 83, 62, 0.16) 1px, transparent 1.2px) 0 0 / 26px 26px,
    radial-gradient(ellipse at 50% 0%, rgba(255, 255, 255, 0.55), transparent 55%),
    var(--paper);
  font-family: var(--font-ui);
}
.login-wrap {
  width: min(360px, calc(100vw - 40px));
  margin: 15vh auto 0;
  padding: 34px 32px 26px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: rgba(255, 252, 244, 0.72);
  box-shadow: 0 24px 60px rgba(63, 51, 33, 0.10);
  text-align: center;
  backdrop-filter: blur(4px);
}
.login-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin-bottom: 10px;
  border: 1px solid var(--line-strong);
  border-radius: 15px;
  background: rgba(255, 253, 247, 0.6);
  color: var(--accent);
}
.login-title {
  margin: 0;
  font-family: var(--font-note);
  font-size: 32px;
  font-weight: 650;
  letter-spacing: 0.01em;
}
.login-sub { margin: 5px 0 22px; color: var(--muted); font-size: 12px; }
.login-error {
  margin: 0 0 12px;
  padding: 7px 10px;
  border-radius: 6px;
  background: rgba(169, 69, 53, 0.08);
  color: var(--danger);
  font-size: 12px;
}
.login-form { display: flex; flex-direction: column; gap: 9px; }
.login-input {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  outline: none;
  background: rgba(255, 253, 247, 0.75);
  font-size: 15px;
  text-align: center;
}
.login-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(180, 95, 63, 0.10); }
.login-btn {
  width: 100%;
  padding: 10px;
  border: 0;
  border-radius: 7px;
  background: var(--ink);
  color: #f8f2e6;
  font-size: 14px;
  letter-spacing: 0.08em;
}
.login-btn:hover { background: var(--accent-deep); }
.login-foot { margin: 22px 0 0; color: var(--faint); font-size: 10.5px; }

/* ---------------- 响应式 ---------------- */

@media (max-width: 860px) {
  .app { grid-template-columns: minmax(0, 1fr); }
  .rail {
    position: fixed;
    inset: 0 auto 0 0;
    width: 276px;
    max-width: 84vw;
    z-index: 110;
    transform: translateX(-102%);
    transition: transform 0.22s ease;
    box-shadow: 12px 0 40px rgba(50, 38, 22, 0.14);
  }
  .rail-open .rail { transform: translateX(0); }
  .rail-scrim {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 105;
    background: rgba(43, 35, 25, 0.28);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
  }
  .rail-open .rail-scrim { opacity: 1; pointer-events: auto; }
  .rail-close, .rail-open { display: inline-flex; }
  .rail-close.icon-btn, .rail-open.icon-btn { display: inline-flex; }
  .rail-close { font-size: 20px; }
  .board-more { opacity: 0.5; }
  .stage { grid-template-rows: 54px minmax(0, 1fr); }
  .topbar { padding: 0 9px; gap: 7px; }
  .board-title { max-width: 46vw; font-size: 14px; }
  .save-status { margin-right: 2px; font-size: 10.5px; max-width: 86px; overflow: hidden; text-overflow: ellipsis; }
  .top-btn { width: 30px; height: 30px; }
  #helpBtn { display: none; }
  .toolbar {
    bottom: calc(12px + env(safe-area-inset-bottom, 0px));
    max-width: calc(100vw - 20px);
    padding: 5px;
    border-radius: 12px;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .toolbar::-webkit-scrollbar { display: none; }
  .tool-btn { width: 38px; height: 38px; flex: 0 0 auto; }
  .tool-sep { margin: 0 3px; }
  .pen-opts { flex: 0 0 auto; }
  .empty-card { padding: 22px 20px; }
  .hint-desktop { display: none; }
  .hint-touch { display: block; }
  .modal { padding-top: 8vh; }
  .help-grid { grid-template-columns: 1fr; }
  .search-card { max-height: 78vh; }
  .toast { bottom: calc(78px + env(safe-area-inset-bottom, 0px)); }
}

@media (max-width: 420px) {
  .board-title { max-width: 38vw; }
  #fitBtn { display: none; }
  .tool-btn { width: 35px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .card.flash { animation: none; }
}